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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Parthasarathy, S. Tufts, D. |
| Copyright Year | 1987 |
| Description | Author affiliation: University of Rhode Island, Kingston, RI (Parthasarathy, S.) |
| Abstract | The analysis of signals that can be represented as a linear combination of exponentially damped sinusoids where the values of damping factors, frequencies, and the linear combination coefficients change at certain transition times is considered. These transitions represent the opening and closing of the glottis in the case of speech signals. Techniques are presented for the accurate estimation of the exponential parameters and the times of transition, from noise corrupted observations of the signal. The exponential parameters are obtained by improved linear prediction techniques using low-rank approximations, and further refined by an iterative least-squares technique with stability constraints imposed on the damping factors. Optimal estimates (in the least-squares sense) of the time of transition are presented. Our knowledge of the signal structure is used to obtain improved performance and also a computationally efficient estimation algorithm. Experiments with real, connected speech indicate that the speech waveforms can be accurately represented from a small number of parameters using the analysis presented here. |
| Starting Page | 645 |
| Ending Page | 648 |
| File Size | 135282 |
| Page Count | 4 |
| File Format | |
| DOI | 10.1109/ICASSP.1987.1169572 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1987-04-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Speech analysis Signal analysis Damping Delay effects Delay estimation Parameter estimation Frequency Stability Reflection Additive noise |
| Content Type | Text |
| Resource Type | Article |
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